单项选择题
The operation between two fuel injections is called a working cycle, which consists of a fixed sequence of eventsWhat does "which" mean in this sentence?（）
A.a working cycle
B.the operation
C.two fuel injections
D.events
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The operation between two fuel injections is called a （）.
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单项选择题
The operating diesel generators will have their exhaust temperatures, cooling water and lubricating oil temperatures and pressures （） in much the same way as for the main engine.
A.to be kept
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单项选择题
The oil was pumped up in the settle tank such a height that it （）.
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